Having had a look into the NIAC study "Antimatter Harvesting in Space" ( www.niac.usra.edu/files/library/meeting ... ackson.pdf ) just this moment I found on page 5 the information: [quote]Antiproton Production @ Fermilab
â€¢ Present: 10^11 antiprotons/hour for 4500 hours per year
â€¢ Present: 27.4 M$/year for purchase of all antiprotons
â€¢ Near Future: Agreement to purchase 1% of Fermilab
production for an annual cost of 274 k$, plus cost of
construction, utilities, and safety oversight of the Hbar
Technologies research facility on the Fermilab site.
â€¢ Cost per Treatment: Assuming 10^10 antiprotons per
â€œtreatmentâ€

Regarding the usual absence of antimatter: what about using the usual and permanent quantum fluctuations in the vacuum? An ion might capture the electron of an electron-positron-pair - might there be a way to catch the positron magnetically that fast and quickly that it can't annihilate with the electron?